Repair Inspection Technique Based on Elastic-Wave Tomography Applied for Deteriorated Concrete Structures

Applying elastic wave tomography as an innovative NDT method, the evaluation of velocity distribution in three-dimensional (3D) before and after the repair is introduced in this study. The increase in the velocity with penetration of the repair material according to the repair effect is identified visually and quantitatively. The 3D tomography technique is newly proposed for one-side access inspection, using drill hammering to generate an elastic wave. Accordingly, the elastic wave velocity distribution result enables to visualize the internal quality of concrete after patch repair is successfully done. In addition, an attempt for reinforced concrete (RC) slab panels is made to confirm the effectiveness of the repair by comparing the velocity distribution of elastic waves obtained from acoustic emission (AE) tomography analysis, before and after the repair. Thus, the velocity recoveries due to injection are found in all the slab panels, and it is confirmed that the elastic wave velocities obtained using this technique can serve as an indicator for examining the state of crack and void filling with injected material. Further, a good correlation is found between the low-velocity region before repair and the amount of injection. These results show the potential of the AE tomography technique to be used as a method for estimating the effect of injection repair

Attenuation of Immune-Mediated Renal Injury by Telmisartan, an Angiotensin Receptor Blocker and a Selective PPAR-γ Activator

Background/Aims: Anti-glomerular basement membrane (GBM) nephritis is characterized by activation of the renin-angiotensin system. This study aimed to determine the question of whether a temporary angiotensin II blockade at the initial stage of anti-GBM nephritis is able to attenuate the disease as well as differences in renoprotection among angiotensin II receptor blockers (ARBs) with distinct peroxisome proliferator-activated receptor (PPAR)-γ-modulating activities. Methods: C57BL/6J mice were immunized with rabbit IgG, followed by intravenous injection of rabbit anti-mouse antibodies. Mice were then treated with telmisartan, losartan, and telmisartan + GW9662 (a PPAR-γ antagonist) for 5 days, or hydralazine for 9 days. On days 8 and 13, mice were sacrificed to obtain tissues for histological analysis. Results: The temporary administration of telmisartan significantly suppressed glomerular damage compared to hydralazine. Losartan showed a similar effect but was less effective. Co-administration of GW9662 attenuated the renoprotective effect of telmisartan, almost to levels observed with losartan. In particular, it limited the decreased infiltration of inflammatory cells and preservation of capillaries in the glomeruli induced by telmisartan. Conclusion: Temporary angiotensin II blockade at the initial stage of anti-GBM disease dramatically inhibited its progression. In addition to a class effect of ARBs, telmisartan modified inflammation and endothelial damage in the kidney through its PPAR-γ-agonistic action

Study of gauge (in)dependence of monopole dynamics

We investigated the gauge (in)dependence of the confinement mechanism due to monopole condensation in SU(2) lattice QCD by various abelian projections. We found (1) the string tension can be reproduced by monopoles alone also in Polyakov gauge and (2) the behaviors of the Polyakov loop at the critical temperature seem to be explained by the uniformity breaking of the monopole currents in every gauge.Comment: 4pages (7 figures), Latex, Contribution to Lattice 9

MonopoleとQuench近似におけるSU(3)QCDのhadron spectrum

取得学位：博士(理学)，学位授与番号：博甲第263号，学位授与年月日：平成10年9月30日,学位授与年：199

ATP検査を用いた病院清掃方法の検討

（目的）本研究の目的は，傷病者や高齢者など易感染者の治療と療養の場である病院において，日和見感染による院内感染がしばしば発生する一因になっているコンタクトポイントのふき取り状況を客観的に評価し，コンタクトポイントの有効な清掃方法を明らかにすることである．（方法）本研究は複数の液剤を用い，ふき取り効果を比較した．ふき取り効果の監査方法にはアデノシン三リン酸（Adenosine Tri-Phosphate）よる検査（ATP検査）を用いた．使用する液剤による効果の比較実験は，試験検体を用いた実験と病棟内の蛇口を用いた病棟環境表面における実験を行なった．病棟環境表面における実験では，ふき取りにマイクロファイバークロスを用いた．（結果）試験検体を用いた実験では，70％アルコールを使用すると，ふき取り効果が低いと結論づけられた．病棟環境表面における実験では，試験検体を用いた実験においてふき取り効果の低かった70％アルコール以外の水道水，ナノバブル，スーパーミル，クワットスタット，過酸化水素水，CK を用いた．その結果，使用した液剤には，いずれの液剤もふき取り効果が認められ，それらのふき取り効果に差がないことがわかった．同時に行った微生物検査では，25箇所中2箇所から緑膿菌が検出された．このことから，病棟環境表面のふき取りには除菌作用のある液剤を用いることが，より適切である可能性が示唆された．また，25箇所の蛇口を6つの液剤のいずれかで6日間連続して1日，1回ふき取りした結果，どの蛇口も1日目のふき取り効果に比して2日目はふき取り効果が上がり，3日目以降は安定したふき取り効果を示した．この結果から，連続してふき取るとふき取り効果が上げることが示唆された．（結論）病院内のコンタクトポイントの清掃には，除菌効果のある液剤を用いること，さらに，定期清掃が有効である

Dimensionality-driven insulator–metal transition in A-site excess non-stoichiometric perovskites

Coaxing correlated materials to the proximity of the insulator–metal transition region, where electronic wavefunctions transform from localized to itinerant, is currently the subject of intensive research because of the hopes it raises for technological applications and also for its fundamental scientific significance. In general, this tuning is achieved by either chemical doping to introduce charge carriers, or external stimuli to lower the ratio of Coulomb repulsion to bandwidth. In this study, we combine experiment and theory to show that the transition from well-localized insulating states to metallicity in a Ruddlesden-Popper series, La0.5Srn+1−0.5TinO3n+1, is driven by intercalating an intrinsically insulating SrTiO3 unit, in structural terms, by dimensionality n. This unconventional strategy, which can be understood upon a complex interplay between electron–phonon coupling and electron correlations, opens up a new avenue to obtain metallicity or even superconductivity in oxide superlattices that are normally expected to be insulators